Tag Archives: waste.

905–914 K. Tihomirova, V. Denisova, L. Jaudzema and L. Mezule
Hydrolysed biomass waste as a potential biosorbent of zinc from water
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Hydrolysed biomass waste as a potential biosorbent of zinc from water

K. Tihomirova*, V. Denisova, L. Jaudzema and L. Mezule

Riga Technical University, Faculty of Civil Engineering, Research Centre for Civil Engineering, Water Research Laboratory, Kipsalas 6a–263, LV–1048 Riga, Latvia
*Correspondence: kristina.tihomirova@rtu.lv

Abstract:

In the last 10 years recycling of various materials and metal recovery from waste with low cost biosorbents or agricultural biomass has become popular trend. Lignocellulosic biomass is regarded as a sustainable resource for biofuel production. In this process, lignocellulosic biomass is partly degraded during chemical or biological hydrolysis, as a result, these agricultural waste materials usually present a disposal problem and have no economic value. Therefore, reuse of lignocellulosic waste materials as inexpensive and alternative sorbent for heavy metals in polluted aqueous solution.
The aim of this research was to evaluate the applicability of hydrolysed biomass waste for zinc removal from water solution. To evaluate the potential use of lignocellulosic biomass for biosorption, experiments were performed with dry, washed from organic matter and hydrolysed hay. The results showed that hydrolysed hay have lower biosorption capacity than washed and dried hay, however, it still can be used as a low-cost biosorbent for the removal of Zn in polluted aqueous solutions, because it showed relatively high cink sorption capasity (336–391 mg g-1).

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291-298 P. Valášek and M. Müller
EPDM rubber material utilization in epoxy composite systems
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EPDM rubber material utilization in epoxy composite systems

P. Valášek* and M. Müller

¹Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, Prague; *Correspondence: valasekp@tf.czu.cz

Abstract:

Observing of possibilities for secondary raw materials utilization should rank among the key interests of the society. Nowadays, there are a lot of modern workplaces which are devoted to the possibilities of collecting, processing and using rubber materials. EPDM waste rubber in the form of particles is one of the many products of these workplaces. One of the possibilities for recycling this waste particles material is their interaction with another polymeric material. A reactoplastic which is filled with these particles comes into consideration. This way of utilization of the material is inexpensive and simple. The paper focuses on chosen mechanical qualities of the Epoxy/EPDM waste rubber composite. The waste rubber was gained as one of the outputs of a recycling line of the firm Gumoeko, Ltd., the reactoplastic was represented by a two-component epoxy resin. Distraction of rubber particles in the epoxy matrix was achieved by mechanical mixing without using the technology of vacuum. In the paper, the porosity, tensile strength and shear strength of the composites with various concentrations of EPDM are described. The resulting composite systems may find their application in the field of agriculture – especially during joining and sealing materials of larger units where high quality connections are not required.

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